Curated Eaglercraft clients and modpacks ready to install.
Close Sulfur?
Any active session or unsaved edits will be saved.
Add New Instance
Upload a custom HTML client, link a hosted URL, or select from curated collections.
Click or Drag & Drop local .html client file here
File will be stored securely in local browser storage
Select or drop a sulfur-collection.json file
Bulk import multiple instances and settings
Collection Preview
0 instances ready to import
Edit Instance
Delete Instance?
Are you sure you want to remove this instance? This cannot be undone.
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Welcome to Sulfur Launcher
The high-performance web client launcher for Eaglercraft. Manage local HTML clients, connect to hosted instances, and track your playtime all in one sleek place.
Local Client Linking
Link your own custom Eaglercraft HTML files directly without external hosting.
Live Playtime Tracking
Automatic session timer records your hours played across every client.
Install as Desktop App (PWA)
Run Sulfur as a standalone desktop application with zero browser navigation UI and instant offline access.
Chrome / EdgeClick the Install App button below or the install icon in your browser URL bar.
Safari / iOSTap Share → Add to Home Screen.
Instances & Local Collections
Easily organize and import your client library.
Add & Edit Instances
Customize titles, version tags, background artwork, and client launch URLs anytime.
Import/Export Collections
Share your full setup via sulfur-collection.json format.
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You're All Set!
Your launcher is ready to play. Launch Sulfur Client or add your custom builds.
Launcher Statistics & Playtime
Detailed breakdown of your overall gaming activity in Sulfur Launcher.